NOAA Logo

NWS Logo

Organizations

Space Weather Prediction Center

National Oceanic and Atmospheric Administration

Wednesday, August 23, 2017 02:26:13

Main menu

NOAA Scales mini

minimize icon
Space Weather Conditions
24-Hour Observed Maximums
R
no data
S
no data
G
no data
Latest Observed
R
no data
S
no data
G
no data
R1-R2 --
R3-R5 --
S1 or greater --
G
no data
R1-R2 --
R3-R5 --
S1 or greater --
G
no data
R1-R2 --
R3-R5 --
S1 or greater --
G
no data
maximize icon
R
no data
S
no data
G
no data
Current Space Weather Conditions
R1 (Minor) Radio Blackout Impacts
close
HF Radio: Weak or minor degradation of HF radio communication on sunlit side, occasional loss of radio contact.
Navigation: Low-frequency navigation signals degraded for brief intervals.
More about the NOAA Space Weather Scales

Halo CME on the Farside of the Sun

Halo CME on the Farside of the Sun
published: Wednesday, July 26, 2017 20:34 UTC

A fast, far-sided halo CME was observed beginning at 04:36 UTC on 23 July in coronagraph imagery.  The event originated from old Region 2665 (S06, L=111) which was responsible for two M-class flares during its rotation across the visible disk.  The imagery above shows the event as seen from the NASA STEREO A spacecraft (left and right images) and the coronagraph on the NASA SOHO spacecraft (center).  This CME is on the opposite side of the Sun and will not be geoeffective.